An experimental study on swirling flow in a 90 degree circular tube by using particle image velocimetry

Chang, Tae-Hyun; Lee, H. S.

doi:10.1007/bf03181741

Cited by 11 publications

(2 citation statements)

References 9 publications

(10 reference statements)

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“…In order to study the deposition of hydrate particles in the pipeline, the parameter of particle deposition rate was introduced through the reference of relevant literature [28][29] , which refers to the percentage of particles deposited in the pipeline per unit time to particles entering the pipe section per unit time. The expression is as follows:…”

Section: Hydrate Particle Deposition Lawmentioning

confidence: 99%

Numerical Simulation on Gas Hydrate Particle Deposition in Bending Pipe

Rao,

Zheng,

Wang

et al. 2023

Preprint

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Bending pipe is a common component of long distance pipeline. Accurately understanding the flow law of hydrate particles in elbow pipe is of great significance for optimizing pipeline design, improving production efficiency of gas transmission pipeline and ensuring pipeline safety. Taking the flow of hydrate particles in a Bending pipe as the object of study, the spiral flow attenuation and hydrate particle deposition under different bending pipe angles, different rate of bending pipe to diameter, different Reynolds number and different torsion were studied by numerical simulation method. The results show that the larger the swirl number, the higher the spiral flow intensity. When the fluid enters the bending pipe, the Angle of the bending pipe is larger, the torsional rate is smaller, and the Reynolds number is larger, the swirl number is larger, the intensity of the swirl flow is stronger, and the swirl number is larger at the same position. However, the larger the bending pipe to diameter ratio, the greater the change of the total swirl number and the weaker the strength at outflow, but the slower the change of swirl number, indicating that the spiral flow attenuation is slower. The larger the bending pipe Angle, the larger the bending pipe diameter rate, the smaller the torsion rate and the larger the Reynolds number, the smaller the deposition rate of the particles after flowing through the pipe. The results show that the spiral flow strength can be maintained in a proper way to reduce the deposition and ensure the safety of the conveying process.

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Section: Hydrate Particle Deposition Lawmentioning

confidence: 99%

Numerical Simulation on Gas Hydrate Particle Deposition in Bending Pipe

Rao,

Zheng,

Wang

et al. 2023

Preprint

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“…Due to the inertia force generated in the curved pipe, these vortices were carried to the outside of the curved channel. Chang [29] used the particle image velocity measurement method to study the flow of rotating particles in a 90-degree circular tube, as well as the distribution of time-mean velocity and time-mean turbulence intensity on longitudinal cross sections under different Reynolds numbers.…”

mentioning

confidence: 99%

Numerical simulation study on the influence of bend diameter rate on the flow characteristics of nature gas hydrate particles

Rao,

Wang,

Wang

et al. 2024

Preprint

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Bend pipe is a common part of long distance pipeline. It is of great significance to accurately grasp the flow law of hydrate particles in the bend pipe to optimize the pipeline design, improve the production efficiency and ensure the safety of gas transmission pipeline. With the flow of hydrate particles in a curved pipe as the object of study, the effects of Bend diameter rate and Reynolds number on the velocity distribution, turbulent kinetic energy change, wall shear force, particle motion and pressure drop distribution of the spiral flow carrying hydrate particles were investigated by numerical simulation method.The results show that the smaller the rate of bend to diameter, the easier the high speed zone is to appear inside the bend. Moreover, the uniformity of the velocity distribution of the fluid flowing through the bend is slower with the smaller the rate of the bend to the diameter. Increasing the Reynolds number of the initial transport can maintain the helical flow strength of the fluid after passing through the bend pipe, so that the flow can obtain higher tangential force. The presence of the twisted tape leads to greater flow resistance, which makes the pressure drop increase at the position of the twisted tape different. At the same position, the Reynolds number is larger, and the pressure drop increases larger, and the Bend diameter rate is larger, and the fluid speed recovers faster, and the velocity is smaller, and the unit pressure drop is smaller. The increase of Reynolds number can reduce the resistance coefficient of the Bend part, but the increase of the Bend diameter rate makes the resistance coefficient decrease first and then increase.

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Combined hot-wire and PIV measurements of a swirling turbulent flow at the exit of a 90° pipe bend

Vester

Sattarzadeh

2015

J Vis

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An experimental study on swirling flow in a 90 degree circular tube by using particle image velocimetry

Cited by 11 publications

References 9 publications

Numerical Simulation on Gas Hydrate Particle Deposition in Bending Pipe

Numerical Simulation on Gas Hydrate Particle Deposition in Bending Pipe

Numerical simulation study on the influence of bend diameter rate on the flow characteristics of nature gas hydrate particles

Combined hot-wire and PIV measurements of a swirling turbulent flow at the exit of a 90° pipe bend

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